US7679377B2 - Measuring apparatus and method for determining a dielectric property, in particular moisture and/or density, in a product - Google Patents
Measuring apparatus and method for determining a dielectric property, in particular moisture and/or density, in a product Download PDFInfo
- Publication number
- US7679377B2 US7679377B2 US11/793,947 US79394705A US7679377B2 US 7679377 B2 US7679377 B2 US 7679377B2 US 79394705 A US79394705 A US 79394705A US 7679377 B2 US7679377 B2 US 7679377B2
- Authority
- US
- United States
- Prior art keywords
- measuring
- measuring apparatus
- frequency wave
- product
- capacitor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related, expires
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
- G01N27/221—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance by investigating the dielectric properties
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24C—MACHINES FOR MAKING CIGARS OR CIGARETTES
- A24C5/00—Making cigarettes; Making tipping materials for, or attaching filters or mouthpieces to, cigars or cigarettes
- A24C5/32—Separating, ordering, counting or examining cigarettes; Regulating the feeding of tobacco according to rod or cigarette condition
- A24C5/34—Examining cigarettes or the rod, e.g. for regulating the feeding of tobacco; Removing defective cigarettes
- A24C5/3412—Examining cigarettes or the rod, e.g. for regulating the feeding of tobacco; Removing defective cigarettes by means of light, radiation or electrostatic fields
Definitions
- FIG. 1 a schematic circuit of an essentially analogue measuring apparatus
- the measuring circuit 27 is the part of the circuit device 28 directly connected to the measuring capacitor 11 . Any measuring circuit which is designed to generate an adequate amplitude and phase variation of the high-frequency wave as a result of the product 12 passing through the measuring capacitor 11 is suitable here. Two preferred embodiments of the measuring circuit 27 are shown in FIGS. 2 and 3 , wherein the measuring capacitor 11 , a resistor 29 and an inverting operational amplifier 30 are connected in a differentiating arrangement according to FIG. 2 or an integrating arrangement according to FIG. 3 . The non-inverting input of the operational amplifier 30 is appropriately grounded. With the integrating arrangement according to FIG.
- an electrode 15 , 16 of the measuring capacitor 11 in the form of a metal surface, for example a metal coating, for example by vapor deposition of gold.
- the measuring capacitor 11 is therefore designed as a plate capacitor with plate-like electrodes 15 , 16 which are disc-shaped and oriented perpendicularly to the longitudinal direction L and comprise a central through-hole for the endless product rod 12 .
- the field lines run substantially parallel to the direction of transport.
- a field-filled space 45 which is radially outwardly closed off by the boundary body 44 .
- FIG. 6 A preferred embodiment of a measuring apparatus 10 is shown in FIG. 6 , parts corresponding to each other being denoted by corresponding reference numbers in the 200s.
- the device 18 for determining the measurable variables is constructed with digital electronics.
- the device 18 for determining the measurable variables has an A/D converter 66 to which is passed the measuring signal emitted by the measuring circuit 27 .
- the A/D converter 66 is clock-controlled with a scanning frequency which is higher by a factor of n than the frequency of the high-frequency wave, n being a natural number greater than 1.
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- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Electrochemistry (AREA)
- Biochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Toxicology (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004063228A DE102004063228B4 (de) | 2004-12-22 | 2004-12-22 | Meßvorrichtung und -verfahren zur Bestimmung einer dielektrischen Eigenschaft, insbesondere der Feuchte und/oder Dichte, eines Produkts |
DE102004063228 | 2004-12-22 | ||
DE102004063228.6 | 2004-12-22 | ||
PCT/EP2005/013831 WO2006069721A2 (de) | 2004-12-22 | 2005-12-17 | Messvorrichtung und -verfahren zur bestimmung einer dielektrischen eigenschaft, insbesondere der feuchte und/oder dichte, eines produkts |
Publications (2)
Publication Number | Publication Date |
---|---|
US20080164887A1 US20080164887A1 (en) | 2008-07-10 |
US7679377B2 true US7679377B2 (en) | 2010-03-16 |
Family
ID=35871130
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/793,947 Expired - Fee Related US7679377B2 (en) | 2004-12-22 | 2005-12-17 | Measuring apparatus and method for determining a dielectric property, in particular moisture and/or density, in a product |
Country Status (6)
Country | Link |
---|---|
US (1) | US7679377B2 (zh) |
EP (1) | EP1836482A2 (zh) |
JP (1) | JP4526043B2 (zh) |
CN (1) | CN101088008A (zh) |
DE (1) | DE102004063228B4 (zh) |
WO (1) | WO2006069721A2 (zh) |
Cited By (3)
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---|---|---|---|---|
US20090120202A1 (en) * | 2007-11-09 | 2009-05-14 | Norbert Diekhans | Agricultural working machine |
US20110036155A1 (en) * | 2004-12-29 | 2011-02-17 | Rain Bird Corporation | Soil Moisture Sensor and Controller |
US20110074401A1 (en) * | 2009-09-30 | 2011-03-31 | Thermo Fisher Scientific | Apparatus and method for automatic product effect compensation in radio frequency metal detectors |
Families Citing this family (18)
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---|---|---|---|---|
DE102004063229B4 (de) * | 2004-12-22 | 2007-06-14 | Hauni Maschinenbau Ag | Meßvorrichtung und -verfahren zur Erkennung von Fremdkörpern in einem Produkt, insbesondere in Tabak, Baumwolle oder einem anderen Faserprodukt |
RU2331894C1 (ru) | 2007-02-14 | 2008-08-20 | Открытое акционерное общество Научно-производственная Компания "Высокие Технологии" | Способ измерения диэлектрических характеристик материальных тел и устройство для его реализации |
DE102008032835A1 (de) * | 2008-07-14 | 2010-01-21 | Hauni Maschinenbau Ag | Verfahren und Vorrichtung zur Messung der Beladung eines Stranges der Tabak verarbeitenden Industrie mit einer Stoffmenge |
CH699752A1 (de) * | 2008-10-16 | 2010-04-30 | Uster Technologies Ag | Vorrichtung und verfahren zum ausmessen einer kapazität. |
IT1393473B1 (it) * | 2009-03-10 | 2012-04-20 | Microtec Srl | Metodo di taratura per apparecchiature per la determinazione del grado di umidità di prodotti sulla base di misure capacitive, e dispositivo per la simulazione delle proprietà dielettriche di prodotti, quali legname, da utilizzare in tale metodo. |
CN102207522B (zh) * | 2011-04-01 | 2013-01-02 | 广州润芯信息技术有限公司 | 一种基于频率测量的rc常数测量方法 |
DE102011083052B4 (de) | 2011-09-20 | 2016-03-10 | Hauni Maschinenbau Ag | Kapazitive HF-Strangmessvorrichtung und Strangmaschine |
US9128031B2 (en) | 2012-02-21 | 2015-09-08 | Varel International Ind., L.P. | Method to improve the leaching process |
US9423436B2 (en) | 2012-02-21 | 2016-08-23 | Varel International Ind., L.P. | Method and apparatus to assess the thermal damage caused to a PCD cutter using capacitance spectroscopy |
US9377428B2 (en) * | 2012-02-21 | 2016-06-28 | Varel International Ind., L.P. | Non-destructive leaching depth measurement using capacitance spectroscopy |
US9423370B2 (en) | 2012-02-21 | 2016-08-23 | Varel International Ind., L.P | Use of capacitance to analyze polycrystalline diamond |
DE102012209954A1 (de) | 2012-06-14 | 2013-12-19 | Hauni Maschinenbau Ag | Verfahren und Vorrichtung zur Erkennung von Stranginhomogenitäten eines Materialstrangs der Tabak verarbeitenden Industrie |
DE102015105353A1 (de) * | 2015-04-09 | 2016-10-13 | Hauni Maschinenbau Gmbh | Saugbandförderer und Strangmaschine der Tabak verarbeitenden Industrie, Verwendung und Verfahren zum Messen von Materialeigenschaften eines Materialstrangs der Tabak verarbeitenden Industrie |
DE102015119453B4 (de) | 2015-11-11 | 2017-06-22 | Hauni Maschinenbau Gmbh | Vorrichtung und Verfahren zur Bestimmung des Anteils mindestens eines Zusatzstoffs in einem tabakhaltigen Stoff, und Maschine der Tabak verarbeitenden Industrie |
SE541463C2 (sv) * | 2017-10-06 | 2019-10-08 | Sealwacs Ab | Plastsvetssensor |
CN108982766B (zh) * | 2018-07-06 | 2021-05-25 | 山东中烟工业有限责任公司 | 一种卷烟烟支密端指标确定方法及应用 |
JP7369081B2 (ja) * | 2020-04-03 | 2023-10-25 | 応用地質株式会社 | 誘電率推定装置及び誘電率推定方法 |
US11904959B2 (en) | 2021-10-07 | 2024-02-20 | Zf Active Safety And Electronics Us Llc | Detecting water ingress in electronic power steering systems |
Citations (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB717127A (en) | 1951-07-27 | 1954-10-20 | Unilever Ltd | Improvements in apparatus for measuring dielectric properties of materials |
FR1315918A (fr) | 1961-12-14 | 1963-01-25 | Commissariat Energie Atomique | Détecteur de passages de fragments de gaines |
GB1132763A (en) | 1966-03-03 | 1968-11-06 | Rowntree And Company Ltd | Measuring moisture content and other properties of solids and liquids |
US3786349A (en) | 1973-05-03 | 1974-01-15 | Northern Electric Co | Electrical reactance and loss measurement apparatus and method |
DE2500299A1 (de) | 1974-03-23 | 1975-09-25 | Hauni Werke Koerber & Co Kg | Anordnung zum erfassen der masse eines stromes aus tabak oder einem anderen material der tabakverarbeitenden industrie |
DE2441832A1 (de) | 1974-08-31 | 1976-03-11 | Hauni Werke Koerber & Co Kg | Verfahren und anordnung zum kapazitiven pruefen der tabakdichte in den enden von stabfoermigen artikeln der tabakverarbeitenden industrie |
US3979581A (en) | 1974-02-26 | 1976-09-07 | Hauni-Werke Korber & Co., Kg | Method and arrangement for determining the mass of tobacco or the like by capacitance and attenuation measurements in a resonant high frequency oscillator circuit |
DE2700972A1 (de) | 1977-01-12 | 1978-07-13 | Truetzschler & Co | Verfahren und vorrichtung zur ueberwachung von fremdkoerpern in einem textilfaservlies |
US4114090A (en) | 1976-08-17 | 1978-09-12 | Imasco Limited | Electronic moisture meter |
US4505186A (en) * | 1982-05-18 | 1985-03-19 | Sulzer Brothers Limited | Lubricant monitoring system |
DE3743216A1 (de) | 1987-12-19 | 1989-06-29 | Hauni Werke Koerber & Co Kg | Hochfrequenzschwingkreis |
DE3825111A1 (de) | 1988-07-23 | 1990-01-25 | Hauni Werke Koerber & Co Kg | Verfahren und schaltungsanordnung zum bestimmen einer charakteristischen groesse eines hf-oszillators |
US4947131A (en) * | 1989-04-21 | 1990-08-07 | Modern Controls, Inc. | Capacitance bar sensor |
US5208544A (en) | 1990-09-26 | 1993-05-04 | E. I. Du Pont De Nemours And Company | Noninvasive dielectric sensor and technique for measuring polymer properties |
DE19651355A1 (de) | 1996-12-10 | 1998-06-18 | Fresenius Medical Care De Gmbh | Gasblasendetektor |
EP0902277A1 (de) | 1997-08-13 | 1999-03-17 | Hauni Maschinenbau Aktiengesellschaft | Verfahren und Anordnung zum Erfassen mindestens einer Eigenschaft eines Stoffes |
EP0924513A1 (de) | 1997-12-18 | 1999-06-23 | Zellweger Luwa Ag | Verfahren und Vorrichtung zur Ermittlung von Anteilen fester Stoffe in einem Prüfgut |
US6073480A (en) * | 1996-12-13 | 2000-06-13 | Panametrics, Inc. | Humidity sensor with differential thermal detection and method of sensing |
DE10037180C1 (de) | 2000-07-31 | 2002-01-17 | Reemtsma H F & Ph | Verfahren zum Detektieren und Selektieren von Fremdkörpern in Cigaretten |
DE10100664A1 (de) | 2001-01-09 | 2002-07-11 | Hauni Maschinenbau Ag | Verfahren zum Prüfen eines Produktionsmaterials |
US20030020494A1 (en) * | 2001-05-17 | 2003-01-30 | Isabelle Desmier | Fuel sensor |
US20030107729A1 (en) | 2000-05-31 | 2003-06-12 | Richard Furter | Method and device for detecting impurities in a longitudinally moving thread-like product |
EP1330961A1 (en) | 2002-01-24 | 2003-07-30 | G.D S.p.A. | A method of detecting and eliminating foreign bodies in a flow of tobacco |
EP1327876B1 (de) | 2002-01-11 | 2003-12-17 | TEWS ELEKTRONIK Dipl.-Ing. Manfred Tews | Verfahren und Vorrichtung zur Erkennung von Fremdkörpern in Masseströmen mit Hilfe eines Mikrowellen-Resonators |
US20080084220A1 (en) * | 2004-12-22 | 2008-04-10 | Dierk Schroder | Measuring Apparatus and Method for Recognizing Foreign Bodies in a Product, Particularly Tobacco, Cotton or Another Fibrous Product |
-
2004
- 2004-12-22 DE DE102004063228A patent/DE102004063228B4/de not_active Expired - Fee Related
-
2005
- 2005-12-17 JP JP2007547352A patent/JP4526043B2/ja not_active Expired - Fee Related
- 2005-12-17 EP EP05821925A patent/EP1836482A2/de not_active Withdrawn
- 2005-12-17 WO PCT/EP2005/013831 patent/WO2006069721A2/de active Application Filing
- 2005-12-17 CN CNA2005800442487A patent/CN101088008A/zh active Pending
- 2005-12-17 US US11/793,947 patent/US7679377B2/en not_active Expired - Fee Related
Patent Citations (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB717127A (en) | 1951-07-27 | 1954-10-20 | Unilever Ltd | Improvements in apparatus for measuring dielectric properties of materials |
FR1315918A (fr) | 1961-12-14 | 1963-01-25 | Commissariat Energie Atomique | Détecteur de passages de fragments de gaines |
GB1132763A (en) | 1966-03-03 | 1968-11-06 | Rowntree And Company Ltd | Measuring moisture content and other properties of solids and liquids |
US3786349A (en) | 1973-05-03 | 1974-01-15 | Northern Electric Co | Electrical reactance and loss measurement apparatus and method |
US3979581A (en) | 1974-02-26 | 1976-09-07 | Hauni-Werke Korber & Co., Kg | Method and arrangement for determining the mass of tobacco or the like by capacitance and attenuation measurements in a resonant high frequency oscillator circuit |
US3996942A (en) * | 1974-03-23 | 1976-12-14 | Hauni-Werke Korber & Co., Kg | Arrangement for determining the mass of a stream of tobacco, or other constituent material of smokers' products |
DE2500299A1 (de) | 1974-03-23 | 1975-09-25 | Hauni Werke Koerber & Co Kg | Anordnung zum erfassen der masse eines stromes aus tabak oder einem anderen material der tabakverarbeitenden industrie |
DE2441832A1 (de) | 1974-08-31 | 1976-03-11 | Hauni Werke Koerber & Co Kg | Verfahren und anordnung zum kapazitiven pruefen der tabakdichte in den enden von stabfoermigen artikeln der tabakverarbeitenden industrie |
US4114090A (en) | 1976-08-17 | 1978-09-12 | Imasco Limited | Electronic moisture meter |
DE2700972A1 (de) | 1977-01-12 | 1978-07-13 | Truetzschler & Co | Verfahren und vorrichtung zur ueberwachung von fremdkoerpern in einem textilfaservlies |
DE2700972C3 (de) | 1977-01-12 | 1980-06-12 | Truetzschler Gmbh & Co Kg, 4050 Moenchengladbach | Verfahren und Vorrichtung zur Überwachung von Fremdkörpern in einem Textilfaservlies |
US4505186A (en) * | 1982-05-18 | 1985-03-19 | Sulzer Brothers Limited | Lubricant monitoring system |
DE3743216A1 (de) | 1987-12-19 | 1989-06-29 | Hauni Werke Koerber & Co Kg | Hochfrequenzschwingkreis |
US5302907A (en) * | 1988-07-23 | 1994-04-12 | Korber Ag | Method of and apparatus for ascertaining a characteristic value of a high-frequency oscillator |
DE3825111A1 (de) | 1988-07-23 | 1990-01-25 | Hauni Werke Koerber & Co Kg | Verfahren und schaltungsanordnung zum bestimmen einer charakteristischen groesse eines hf-oszillators |
US4947131A (en) * | 1989-04-21 | 1990-08-07 | Modern Controls, Inc. | Capacitance bar sensor |
US5208544A (en) | 1990-09-26 | 1993-05-04 | E. I. Du Pont De Nemours And Company | Noninvasive dielectric sensor and technique for measuring polymer properties |
DE19651355A1 (de) | 1996-12-10 | 1998-06-18 | Fresenius Medical Care De Gmbh | Gasblasendetektor |
US6073480A (en) * | 1996-12-13 | 2000-06-13 | Panametrics, Inc. | Humidity sensor with differential thermal detection and method of sensing |
EP0902277A1 (de) | 1997-08-13 | 1999-03-17 | Hauni Maschinenbau Aktiengesellschaft | Verfahren und Anordnung zum Erfassen mindestens einer Eigenschaft eines Stoffes |
US6346819B1 (en) * | 1997-12-18 | 2002-02-12 | Zellweger Luwa Ag | Method and device for determining proportions of solid matter in a test material |
EP0924513A1 (de) | 1997-12-18 | 1999-06-23 | Zellweger Luwa Ag | Verfahren und Vorrichtung zur Ermittlung von Anteilen fester Stoffe in einem Prüfgut |
US20030107729A1 (en) | 2000-05-31 | 2003-06-12 | Richard Furter | Method and device for detecting impurities in a longitudinally moving thread-like product |
DE10037180C1 (de) | 2000-07-31 | 2002-01-17 | Reemtsma H F & Ph | Verfahren zum Detektieren und Selektieren von Fremdkörpern in Cigaretten |
DE10100664A1 (de) | 2001-01-09 | 2002-07-11 | Hauni Maschinenbau Ag | Verfahren zum Prüfen eines Produktionsmaterials |
US6768317B2 (en) * | 2001-01-09 | 2004-07-27 | Hauni Maschinenbau Ag | Method of and apparatus for testing a first material for potential presence of second materials |
US20030020494A1 (en) * | 2001-05-17 | 2003-01-30 | Isabelle Desmier | Fuel sensor |
EP1327876B1 (de) | 2002-01-11 | 2003-12-17 | TEWS ELEKTRONIK Dipl.-Ing. Manfred Tews | Verfahren und Vorrichtung zur Erkennung von Fremdkörpern in Masseströmen mit Hilfe eines Mikrowellen-Resonators |
EP1330961A1 (en) | 2002-01-24 | 2003-07-30 | G.D S.p.A. | A method of detecting and eliminating foreign bodies in a flow of tobacco |
US20080084220A1 (en) * | 2004-12-22 | 2008-04-10 | Dierk Schroder | Measuring Apparatus and Method for Recognizing Foreign Bodies in a Product, Particularly Tobacco, Cotton or Another Fibrous Product |
Non-Patent Citations (9)
Title |
---|
Caranti G M et al: "A Vector Impedance Meter Digitally Controlled" Review of Scientific Instruments, AIP, Melville, NY, US, vol. 62, No. 12, Dec. 1, 1991, pp. 3092-3097, XP000278580. |
German Patent and Trademark Office Examination Report dated Oct. 19, 2005, issued in DE 10 2004 063 229.4. |
Huang S M et al: "Electronic transducers for industrial measurement of low value capacitances" Journal of Physics E (Scientific Instruments) vol. 21, No. 3, Mar. 1988, pp. 242-250. |
Iacopini E et al: "Digital techniques applied to phase-sensitive detection" Journal of Physics E (Scientific Instruments) vol. 16, No. 9, Sep. 1983, pp. 844-847, XP020017183. |
International Search Report dated Jul. 19, 2006, issued in PCT/EP2005/013831. |
International Search Report dated Jun. 13, 2006, issued in PCT/EP2005/013830. |
Non Final Office Action issued in U.S. Appl. No. 11/793,948 on Feb. 26, 2009. |
Saniie J et al: "Digital phase detection based on in-phase and quadrature sampling" Journal of Physics E. Scientific Instruments, IOP Publishing, Bristol, vol. 16, No. 7, Jul. 1, 1983 pp. 606-607, XP020017126. |
Smit Q et al: "General purpose self-tuning capacitance sensor [for oil] recycling and soil moisture measurement application]" IMTC/98 Conference Proceedings. IEEE Instrumentation and Measurement Technology Conference. Where Instrumentation is Going (CAT. No. 98CH36222) IEEE New York, NY, USA, vol. 2, 1998, pp. 1074-1078 vol., XP010281750. |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110036155A1 (en) * | 2004-12-29 | 2011-02-17 | Rain Bird Corporation | Soil Moisture Sensor and Controller |
US8104498B2 (en) | 2004-12-29 | 2012-01-31 | Rain Bird Corporation | Soil moisture sensor and controller |
US8671969B2 (en) | 2004-12-29 | 2014-03-18 | Rain Bird Corporation | Soil moisture sensor and controller |
US20090120202A1 (en) * | 2007-11-09 | 2009-05-14 | Norbert Diekhans | Agricultural working machine |
US8610445B2 (en) * | 2007-11-09 | 2013-12-17 | Claas Selbstfahrende Erntemaschinen Gmbh | Agricultural working machine for measuring components of a crop material |
US20110074401A1 (en) * | 2009-09-30 | 2011-03-31 | Thermo Fisher Scientific | Apparatus and method for automatic product effect compensation in radio frequency metal detectors |
US8207731B2 (en) * | 2009-09-30 | 2012-06-26 | Thermofisher Scientific | Apparatus and method for automatic product effect compensation in radio frequency metal detectors |
Also Published As
Publication number | Publication date |
---|---|
EP1836482A2 (de) | 2007-09-26 |
DE102004063228A1 (de) | 2006-07-06 |
CN101088008A (zh) | 2007-12-12 |
US20080164887A1 (en) | 2008-07-10 |
WO2006069721A3 (de) | 2006-10-19 |
JP2008524614A (ja) | 2008-07-10 |
DE102004063228B4 (de) | 2007-06-28 |
WO2006069721A2 (de) | 2006-07-06 |
JP4526043B2 (ja) | 2010-08-18 |
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